Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-18
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, to appear in ESO Astrophysics Symposia 'Extragalactic Globular Cluster Systems', ed. by M. Kissler-Patig
Scientific paper
10.1007/10857603_4
We present the results of an analysis of stellar clusters in the interacting galaxy, M51, using HST-WFPC2 observations. The observations were made in five broad band filters; f336w (U), f439w (B), f555w (V), f675w (R), f814w (I). By comparing the spectral energy distribution (SED) of each source with those those of evolutionary spectral synthesis models, we have derived an age, mass, and extinction for each source. The comparison was done using the 3DEF method, that is based on a least $\chi^{2}$ test. We find 533 sources that are resolved and well fit with cluster models. Using this sample we study the cluster formation history, the cluster initial mass function (cIMF), and search for evidence of cluster disruption. We find that the cIMF is well represented by a power law with index of -2.05. In addition, we confirm the cluster disruption results by Boutloukos and Lamers (2002).
Bastian Nate
Lamers Henny J. G. L. M.
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